  |
World Wide Web Consortium (w3c): XHTML Modularization - http://www.w3.org/MarkUp/Guide/xhtml-m12n-tutorial/
7 sections: introduction; terminology; module construction; DTD construction; module examples; mark-up language examples; usage examples. |
  |
XHTML Tutorial - http://www.w3schools.com/xhtml/
8 pages, including introduction, differences from HTML, syntax, DTD, examples, validation, and a quiz. Also, reference pages provide lists of tags and attributes. |
  |
HTML | XHTML articles and tutorials: A List Apart - http://alistapart.com/topics/html/
A List Apart has many useful articles showing what cane be done with XHTML. Contains step-by-step instructions and tutorials. |
  |
Web Developer's Virtual Library (WDVL): Introduction to XHTML - http://www.wdvl.com/Authoring/Languages/XML/XHTML/
5 parts: introduction; XML and XHTML; document type definitions; differences from HTML; and document structure. |
  |
XHTML Explained - http://www.yourhtmlsource.com/accessibility/xhtmlexplained.html
Tutorial explaining what XHTML is, describing its benefits, and providing some guidelines for coding. |